There are other possible explanations for Odin's difficulty in repairing the Bifrost. Perhaps it is such a monumental undertaking that it's going to take a long time to complete the project. The explosion at the end of Thor was massive and completely destroyed the Bifrost. The machinery of the Bifrost is obviously very sophisticated, so it's reasonable to assume that it would take a while to rebuild or fabricate from scratch, even with Odin's resources.

Consider the amount of resources, technical expertise, time and money it took to build the Large Hadron Collider/CERN facility. Now imagine how long it would take to rebuild the LHC/CERN if, perchance, it were to be blown up. That's the sort of task facing Odin and the Asgardians with regards to the Bifrost, in my view.

Exactly. They might also need very rare materials to build a bifrost and a tremendous amount of power to put it together & start it up, maybe more power than they have at the moment.

__________________I just have one of those faces. People come up to me and say, "What's wrong?" Nothing. "Well, it takes more energy to frown than it does to smile." Yeah, you know it takes more energy to point that out than it does to leave me alone? - Bill Hicks